Megaphone



1935. H. H. KROHN I 2,012,538

MEGAPHONE Filed Sept. 15, 1954 2 Sheets-Sheet l INVENTOR: HENRY H. KROHN.

ATTORNEY.

Aug. 27, 1935. H. H. KROHN 2 ,012,538

MEGAPHONE Filed Sept. 15, 1934 2 Sheets-Sheet 2 Hi m I //,22

INVENTOR:

HENRY H. KROy. W 44/ ATTORNEY.

Patented Aug. 27, 1935 UNITED STATES PATENT OFFICE MEGAPHONE Henry H. Krohn, San Francisco, Calif.

Application September 15, 1934, Serial No. 744,135

2 Claims.

This invention relates to improvements in megaphones and more particularly to foldable megaphones.

Among the objects of the invention is to provide a megaphone which can be folded flat for convenience in carrying in the pocket and also quickly and easily restored to operative condition.

Another object is to produce an instrument of this character that is eihcient for the purpose at a production cost consistent with general distribution as an advertising medium.

Other objects and advantages will appear as the description progresses.

In this specification and the accompanying drawings the invention is disclosed in its preferred form. It is to be understood however that it is not limited to this form because it may be embodied in other forms within the purview of the claims following the description.

In the two sheets of drawings:

Fig. 1 is a perspective view of a foldable megaphone constructed in accordance with this invention and shown in the unfolded or operative condition.

Fig. 2 is an end view of the same looking into the larger end.

Fig. 3 is a similar view of the same, showing the megaphone partially folded.

Fig. 4 is a similar view showing an alternative manner of folding.

Fig. 5 is an enlarged fragmentary detail in cross section on the line V-V, Fig. 3.

Fig. 6 is a fragmentary detail in cross section of a modified construction.

In detail the construction illustrated in the drawings, referring first to Fig. 1, comprises a rectangular megaphone preferably composed of cardboard. It is formed in two sections 1 and 2. These flat sections are scored and folded at 3, l, 5 and 6 respectively, to form the sides I, 8, l and I0, see Fig. 2.

The meeting edges of these side sections are hinged together by the flexible adhesive tape strips H and I2. For additional strength these strips may be duplicated inside as at ll and II.

The megaphone is held in the unfolded position, see Fig. 2, by the continuous wire frame having the top IS, the sides l6, l1 and the bottom bars II, It. The top bar I5 is looped to form the latch 20 passing through the grummet 2|, fixed in the section I.

The bottom bars are oiiset as at 22, 23 in Fig. 5, and passed through the grummets 24, 25 to form a handle loop having the side bars 26, 21 and the crossbar 28 which may be welded at 28 for additional strength, see Fig. 2.

This wire frame is forced in the direction of taper of the megaphone and has a wedging action putting all four sides under tension. This tension of the unfolded megaphone is maintained by flexing the side i outward and back so that the loop 20 passes through the grummet 2 I, as in Fig. 2. The handle 26-21 is then in proper position for manipulating the megaphone in the usual manner.

Folding is accomplished by flexing the side I outward to release the loop 20. The wire frame l5l9 is then free to pivot on the oflsets 22-22 and lie flat against the outside.

Inward pressure against the hinges II and I 2 will collapse the megaphone into the folded position, as in Fig. 3.

It may be folded, as in Fig. 4, by outward pressure against these hinges II and I2. In this position it is a very serviceable fan in hot weather,

or it may be used as a sunshade.

noise maker.

very effective 7 It is also a When slapped against the hand, the wire frame vibrating between the sides I and 2 expresses the user's enthusiasm.

The megaphone can be made of one piece instead of in two sections, by overlapping the edges of a single section as in Fig. 6.

The overlapping edges 8.1: and Illa: can be glued or stapled and score lines substituted for the hinges as at I21 to accomplish the same folding operations above described.

The megaphone blanks can be printed in college colors or decorations and carry advertising matter as desired.

wall of the megaphone.

2. A foldable megaphone; an open wire frame adapted to hold the megaphone unfolded and having its opposite ends extending through the wall thereof; and a latch on said frame detachably engaging said wall.

HENRY H. KROHN. 

